PUBLICATION
Shedding new light on early sex determination in zebrafish
- Authors
- King, A.C., Gut, M., Zenker, A.K.
- ID
- ZDB-PUB-201002-165
- Date
- 2020
- Source
- Archives of toxicology 94(12): 4143-4158 (Journal)
- Registered Authors
- Keywords
- Genes, Juvenile expression, Sex determination, Zebrafish
- MeSH Terms
-
- Animals
- Embryo, Nonmammalian/metabolism
- Female
- Gene Expression Profiling
- Gene Expression Regulation, Developmental
- High-Throughput Nucleotide Sequencing
- Male
- Polymerase Chain Reaction
- Sex Determination Processes*/genetics
- Transcriptome
- Zebrafish/embryology
- Zebrafish/genetics
- Zebrafish/metabolism*
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism*
- PubMed
- 32975586 Full text @ Arch. Toxicol.
Citation
King, A.C., Gut, M., Zenker, A.K. (2020) Shedding new light on early sex determination in zebrafish. Archives of toxicology. 94(12):4143-4158.
Abstract
In contrast to established zebrafish gene annotations, the question of sex determination has still not been conclusively clarified for developing zebrafish, Danio rerio, larvae, 28 dpf or earlier. Recent studies indicate polygenic sex determination (PSD), with the genes being distributed throughout the genome. Early genetic markers of sex in zebrafish help unravel co-founding sex-related differences to apply to human health and environmental toxicity studies. A qPCR-based method was developed for six genes: cytochrome P450, family 17, subfamily A, polypeptide 1 (cyp17a1); cytochrome P450, family 19, subfamily A, polypeptide 1a (cyp19a1a); cytochrome P450, family 19, subfamily A, polypeptides 1b (cyp19a1b); vitellogenin 1 (vtg1); nuclear receptor subfamily 0, group B, member 1 (nr0b1), sry (sex-determining region Y)-box 9b (sox9b) and actin, beta 1 (actb1), the reference gene. Sry-box 9a (Sox9a), insulin-like growth factor 3 (igf3) and double sex and mab-3 related transcription factor 1 (dmrt1), which are also known to be associated with sex determination, were used in gene expression tests. Additionally, Next-Generation-Sequencing (NGS) sequenced the genome of two adult female and male and two juveniles. PCR analysis of adult zebrafish revealed sex-specific expression of cyp17a1, cyp19a1a, vtg1, igf3 and dmrt1, the first four strongly expressed in female zebrafish and the last one highly expressed in male conspecifics. From NGS, nine female and four male-fated genes were selected as novel for assessing zebrafish sex, 28 dpf. Differences in transcriptomes allowed allocation of sex-specific genes also expressed in juvenile zebrafish.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping